CVE-2021-48016criticalobserved exploitationCWE-94

CVE-2021-48016: critical vulnerability in DedeCMS

DedeCMS 5.8.1-beta Unauthenticated RCE via plus/flink.php

Published · Updated

70Vexday Risk Score

Prioritize patching. It exploitation observed by VulnCheck and has a public proof of concept.

ssvc Actcvss 9.3epss 0.4%
from disclosure to weapon
Published on NVDOct 22
VulnCheckOct 22
exploitation probability
0.4%top 62% of all CVEs
observed exploitation
yesVulnCheck
1 public exploit(s)
DedeCMS through 5.8.1-beta contains a PHP code injection vulnerability in ShowMsg() where the HTTP Referer header is written into a DedeTemplate string and included. Unauthenticated attackers can send a crafted Referer to /plus/flink.php?dopost=save with an empty validate code to execute arbitrary PHP and system commands. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-14.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
DedeCMS · DedeCMS
public PoCs found — 1
cve_referencesrcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.htmlunverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — DedeCMS

In the same product, most dangerous first.

CVE-2014-125131MEDIUMDedeCMS 5.6 / 5.7 Reflected XSS via adminDirHand in config.phpEPSS 0.3%CVE-2010-20125HIGHDedeCMS < 5.7 File Inclusion via plus/carbuyaction.phpEPSS —
References
https://github.com/dedecms/DedeCMS/blob/v5.8.1/include/common.func.phphttps://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/dedecms/dedecms-rce.yamlhttps://srcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.htmlhttps://www.vulncheck.com/advisories/dedecms-5.8.1-beta-unauthenticated-rce-via-plus-flink-php